Contact Us
Have questions about buying, selling, or leasing IPv4 addresses? Our team is here to help. We will respond to you as soon as possible.
How We Can Help
Our team of IPv4 market specialists provides end-to-end support for every stage of your IP address transaction. From initial consultation and due diligence to contract preparation, secure escrow payments, and RIR transfer facilitation, we handle the complexity so you can focus on your business.
We serve organizations of all sizes across all five Regional Internet Registry (RIR) regions: RIPE NCC, ARIN, APNIC, LACNIC, and AFRINIC. Our average response time is under 2 hours during business days, and we offer priority support for active transactions.
IPv4 Purchases & Sales
Full brokerage support including market pricing, seller verification, contract preparation, escrow, and RIR transfer coordination.
IPv4 Leasing
Flexible lease terms with automated LOA management, RPKI/ROA setup, and 24/7 monitoring for leased address space.
RIR Transfer Assistance
Expert guidance through RIPE, ARIN, APNIC, LACNIC, and AFRINIC transfer policies, documentation, and approval processes.
Compliance & Due Diligence
Pre-purchase IP reputation checks, blacklist scanning, BGP history analysis, and RPKI validation to ensure clean address space.
Send a Message
Visit Our Offices
We welcome face-to-face meetings and consultations. Please make an appointment before visiting.
Center Office
Headquarters109 Fowler Ct, New Castle, Delaware 19720-5409, United States
Centerium LLC
Turkey Office
OperationsYavuz Sultan Selim Mh. Ali Yücel Sk. No 5/B, Körfez/Kocaeli, Turkey
Centerium Bilişim Teknolojileri ve Danışmanlık Hizmetleri Ltd. Şti.
IPv4Center.com is a Delaware-based company operating under the Centerium LLC brand.
Frequently Asked Questions
Quick answers about reaching and working with our team
You can reach us by email at [email protected], via WhatsApp at +90 850 308 9985, or by using the contact form on this page. For sales inquiries about buying or selling IPv4 addresses, you can also write directly to [email protected].
Our average response time is under 2 hours during business days. Office hours are Monday to Friday, 9:00 – 17:00 (EST), and clients with active transactions receive priority support.
We provide multilingual support in English, Turkish, German, Spanish, French, Portuguese, and Italian — so you can manage your IPv4 transaction in the language you are most comfortable with.
Our headquarters is in New Castle, Delaware, USA (Centerium LLC), and our operations office is in Körfez, Kocaeli, Turkey (Centerium Bilişim Teknolojileri ve Danışmanlık Hizmetleri Ltd. Şti.). We welcome face-to-face meetings — please make an appointment before visiting.
Our team assists with RIR transfer procedures across RIPE NCC, ARIN, APNIC, LACNIC, and AFRINIC, LOA and ROA documentation, RPKI setup, pre-purchase due diligence including blacklist scanning, and lease management for leased address space.
For transaction-related questions, contact our sales team at [email protected] or browse available blocks on the marketplace. We will guide you through pricing, contracts, escrow, and the RIR transfer process.